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path: root/drivers/infiniband/hw/mthca
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Diffstat (limited to 'drivers/infiniband/hw/mthca')
-rw-r--r--drivers/infiniband/hw/mthca/mthca_memfree.c34
-rw-r--r--drivers/infiniband/hw/mthca/mthca_memfree.h1
2 files changed, 35 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.c b/drivers/infiniband/hw/mthca/mthca_memfree.c
index 46981d48c23..ea45de8c5b8 100644
--- a/drivers/infiniband/hw/mthca/mthca_memfree.c
+++ b/drivers/infiniband/hw/mthca/mthca_memfree.c
@@ -192,6 +192,40 @@ void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int o
up(&table->mutex);
}
+void *mthca_table_find(struct mthca_icm_table *table, int obj)
+{
+ int idx, offset, i;
+ struct mthca_icm_chunk *chunk;
+ struct mthca_icm *icm;
+ struct page *page = NULL;
+
+ if (!table->lowmem)
+ return NULL;
+
+ down(&table->mutex);
+
+ idx = (obj & (table->num_obj - 1)) * table->obj_size;
+ icm = table->icm[idx / MTHCA_TABLE_CHUNK_SIZE];
+ offset = idx % MTHCA_TABLE_CHUNK_SIZE;
+
+ if (!icm)
+ goto out;
+
+ list_for_each_entry(chunk, &icm->chunk_list, list) {
+ for (i = 0; i < chunk->npages; ++i) {
+ if (chunk->mem[i].length >= offset) {
+ page = chunk->mem[i].page;
+ break;
+ }
+ offset -= chunk->mem[i].length;
+ }
+ }
+
+out:
+ up(&table->mutex);
+ return page ? lowmem_page_address(page) + offset : NULL;
+}
+
int mthca_table_get_range(struct mthca_dev *dev, struct mthca_icm_table *table,
int start, int end)
{
diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.h b/drivers/infiniband/hw/mthca/mthca_memfree.h
index ef72e430250..fe7be2a6bc4 100644
--- a/drivers/infiniband/hw/mthca/mthca_memfree.h
+++ b/drivers/infiniband/hw/mthca/mthca_memfree.h
@@ -85,6 +85,7 @@ struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev,
void mthca_free_icm_table(struct mthca_dev *dev, struct mthca_icm_table *table);
int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int obj);
void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int obj);
+void *mthca_table_find(struct mthca_icm_table *table, int obj);
int mthca_table_get_range(struct mthca_dev *dev, struct mthca_icm_table *table,
int start, int end);
void mthca_table_put_range(struct mthca_dev *dev, struct mthca_icm_table *table,